DePue Mechanical provides custom industrial sheet metal fabrication, ductwork, ventilation components, equipment guards, hoods, enclosures, and field installation for manufacturing plants, process facilities, commercial buildings, and construction projects across Illinois.
Our team can support the work from field measurement and coordination through shop fabrication and installation, helping reduce field modifications, shorten installation time, and keep complex mechanical work moving.
Whether you need new industrial ductwork, a custom component built around existing equipment, or sheet metal fabrication coordinated with a larger HVAC or mechanical project, DePue provides one team from shop to site.
Sheet metal work inside an operating facility is rarely as simple as fabricating a part from a drawing. Existing equipment may restrict access. Ductwork may need to route around piping, structure, electrical systems, or production lines. Installation may have to occur during a shutdown, and field conditions may not match the original plans.
DePue Mechanical approaches custom sheet metal fabrication as part of the entire mechanical project. We can field-verify existing conditions, coordinate layouts, fabricate components in-house, and install the finished work with our own union sheet metal crews.
That integrated approach is especially valuable for plant expansions, HVAC replacements, production-line modifications, ventilation upgrades, equipment installations, retrofits, and other projects where fabrication accuracy affects schedule, access, or facility uptime.

Industrial ductwork has to do more than move air. Its layout can affect equipment access, exhaust performance, temperature control, maintenance access, production conditions, and the ability to safely operate a facility.
DePue fabricates and installs custom ductwork for industrial HVAC, exhaust, ventilation, equipment connections, and facility retrofit projects. Systems can be built around existing equipment, piping, structure, electrical systems, production areas, and other field constraints.
Projects involving air-handling equipment, rooftop units, exhaust fans, cooling equipment, or other mechanical systems can also be coordinated with DePue's industrial and commercial HVAC services, allowing equipment and ductwork to be planned as one mechanical scope.

Standard components do not always fit the conditions inside an industrial plant. Existing machines, production lines, utilities, building structure, and access limitations can require a fabricated solution designed specifically for the equipment and available space.
DePue fabricates custom sheet metal guards, hoods, safety shrouds, enclosures, covers, equipment connections, transitions, and other project-specific components for industrial and commercial facilities.
Field measurements can be completed before fabrication when existing conditions determine the final dimensions. When a project also requires bases, frames, platforms, supports, or heavier structural components, the work can be coordinated with DePue's equipment setting and steel fabrication services.

Retrofit sheet metal fabrication often begins in the field rather than at the fabrication table. Before material is cut, dimensions, equipment locations, structural conditions, access limitations, duct routes, tie-in points, and surrounding mechanical systems may need to be verified.
DePue can connect field verification with our mechanical design and VDC/BIM services when a project benefits from 3D laser scanning, existing-condition modeling, clash detection, mechanical coordination, fabrication detailing, or prefabrication planning.
This model-to-field approach is particularly valuable when new ductwork or fabricated components must fit around existing piping, equipment, structure, electrical systems, or production infrastructure. The objective is to identify conflicts before fabrication whenever possible so fewer modifications have to be made during installation.

DePue maintains dedicated sheet metal fabrication space with CNC punching, cutting, and forming capabilities, allowing our team to build components around project requirements instead of relying entirely on standard off-the-shelf configurations.
In-house fabrication gives project and field teams greater control over dimensions, sequencing, modifications, and coordination. When field conditions change or a project requires a custom solution, the installation team can communicate directly with the people fabricating the work.
That connection between the shop and field becomes particularly important during retrofits, equipment replacements, shutdown work, and facility upgrades where installation windows may be short and delays can directly affect production.

Industrial sheet metal work is often driven by change inside the facility. A production line may be expanding, new equipment may require ventilation, existing ductwork may conflict with a new layout, or an HVAC system may need to be replaced during a scheduled outage.
DePue supports planned shutdowns, off-shift installations, facility retrofits, equipment upgrades, and plant expansions where fabrication and installation must be coordinated around operating schedules. When conditions allow, components can be measured, coordinated, and fabricated before the installation window begins.
For projects involving multiple mechanical scopes, sheet metal fabrication can also be coordinated with DePue's industrial piping services, HVAC work, equipment setting, VDC, and related mechanical construction.

DePue provides sheet metal fabrication and installation for industrial, manufacturing, process, commercial, municipal, institutional, and construction environments across Illinois. Our work is particularly well suited to facilities where fabricated components must integrate with production equipment, HVAC systems, piping, utilities, structures, and existing building conditions.
In manufacturing facilities, fabricated sheet metal may support production changes, equipment ventilation, exhaust modifications, HVAC improvements, guards, enclosures, and plant expansions.
For food and beverage facilities and chemical and process facilities, the work can also be coordinated around production equipment, utility systems, process environments, ventilation requirements, shutdown schedules, and facility modifications.

Custom fabrication is most valuable when it makes installation easier—not when the finished component becomes another contractor's problem. DePue combines sheet metal fabrication with field measurement, VDC coordination, HVAC expertise, industrial piping, equipment setting, project management, and field installation.
Instead of separating fabrication from construction, our teams can coordinate the work around how the finished system will actually fit, install, operate, and be maintained inside the facility.
DePue has served Illinois facilities since 1964 and self-performs sheet metal work with union tradespeople. For owners, plant teams, construction managers, and general contractors, that means fewer handoffs between fabrication and field execution and one mechanical contractor accountable for the finished result.
General contractors can learn more about our mechanical subcontracting capabilities for Illinois construction projects.

A research facility in Batavia, Illinois required a dedicated rooftop exhaust system that connected interior equipment to a new exterior exhaust fan. DePue's scope incorporated galvanized exhaust ductwork along with the mechanical equipment, roof penetration, supports, vibration isolation, flashing, sealing, and weatherproofing.
The project demonstrates why custom industrial ductwork involves more than fabrication alone. Equipment connections, routing, structural support, roof conditions, field dimensions, and installation all have to work together for the finished system to perform as intended.
See the Batavia rooftop exhaust system project.

Industrial Ventilation, Galvanized Ductwork, and Weatherproof Roof-Penetration Installation
Learn moreWhether you are planning new industrial ductwork, modifying an existing ventilation system, replacing mechanical equipment, expanding a production area, or solving a fabrication problem inside an existing facility, DePue Mechanical can help take the project from field conditions through finished installation.
Bring our team in early when field measurements, fabrication planning, mechanical coordination, shutdown sequencing, or installation access could affect the project.